Rounded views not working in iOS 9

Question

I have a code that takes a view and rounds it corners - turning it into a circle:

imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 8, 8)];
imageView.layer.cornerRadius = imageView.frame.size.width/2;
imageView.layer.masksToBounds = YES;

This works great on iOS 7 and iOS 8 - but doesn't work on iOS 9. How can I fix it?

Answer 1

Turns out adding a background color to the ImageView fixes the issue...

Answer 2

Thanks to @YogevSitton answer I've searched over docs and found this:

It appears to be something in apple docs:

By default, the corner radius does not apply to the image in the layer’s contents property; it applies only to the background color and border of the layer.

So, to set cornerRadius to UIImageView it needs to have backgroundColor.